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2014-04-22Merge tag 'gpio-v3.15-2' of ↵Linus Torvalds2-4/+10
git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio Pull gpio fixes from Linus Walleij: "A small batch of GPIO fixes for the v3.15 series. I expect more to come in but I'm a bit behind on mail, might as well get these to you right now: - Change a crucial semantic ordering in the GPIO irqchip helpers - Fix two nasty regressions in the ACPI gpiolib extensions" * tag 'gpio-v3.15-2' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio: gpio / ACPI: Prevent potential wrap of GPIO value on OpRegion read gpio / ACPI: Don't crash on NULL chip->dev gpio: set data first, then chip and handler
2014-04-19Shiraz has movedViresh Kumar1-2/+2
shiraz.hashim@st.com email-id doesn't exist anymore as he has left the company. Replace ST's id with shiraz.linux.kernel@gmail.com. It also updates .mailmap file to fix address for 'git shortlog'. Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org> Cc: Shiraz Hashim <shiraz.linux.kernel@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2014-04-14gpio / ACPI: Prevent potential wrap of GPIO value on OpRegion readMika Westerberg1-1/+1
Dan Carpenter's static code checker reports: The patch 473ed7be0da0: "gpio / ACPI: Add support for ACPI GPIO operation regions" from Mar 14, 2014, leads to the following static checker warning: drivers/gpio/gpiolib-acpi.c:454 acpi_gpio_adr_space_handler() warn: should 'gpiod_get_raw_value(desc) << i' be a 64 bit type? This is due the fact that *value is of type u64 and gpiod_get_raw_value() returns int. Since i can be larger than 31, it is possible that the value returned gets wrapped. Fix this by casting the return of gpiod_get_raw_value() to u64 first before shift. Reported-by: Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2014-04-14gpio / ACPI: Don't crash on NULL chip->devMika Westerberg1-2/+8
Commit aa92b6f689ac (gpio / ACPI: Allocate ACPI specific data directly in acpi_gpiochip_add()) moved ACPI handle checking to acpi_gpiochip_add() but forgot to check whether chip->dev is NULL before dereferencing it. Since chip->dev pointer is optional we can end up with crash like following: BUG: unable to handle kernel NULL pointer dereference at 00000138 IP: [<c126c2b3>] acpi_gpiochip_add+0x13/0x190 *pde = 00000000 Oops: 0000 [#1] PREEMPT SMP Modules linked in: ssb(+) ... CPU: 0 PID: 512 Comm: modprobe Tainted: G W 3.14.0-rc7-next-20140324-t1 #24 Hardware name: Dell Inc. Latitude D830 /0UY141, BIOS A02 06/07/2007 task: f5799900 ti: f543e000 task.ti: f543e000 EIP: 0060:[<c126c2b3>] EFLAGS: 00010282 CPU: 0 EIP is at acpi_gpiochip_add+0x13/0x190 EAX: 00000000 EBX: f57824c4 ECX: 00000000 EDX: 00000000 ESI: f57824c4 EDI: 00000010 EBP: f543fc54 ESP: f543fc40 DS: 007b ES: 007b FS: 00d8 GS: 0033 SS: 0068 CR0: 8005003b CR2: 00000138 CR3: 355f8000 CR4: 000007d0 Stack: f543fc5c fd1f7790 f57824c4 000000be 00000010 f543fc84 c1269f4e f543fc74 fd1f78bd 00008002 f57822b0 f5782090 fd1f8400 00000286 fd1f9994 00000000 f5782000 f543fc8c fd1f7e39 f543fcc8 fd1f0bd8 000000c0 00000000 00000000 Call Trace: [<fd1f7790>] ? ssb_pcie_mdio_write+0xa0/0xd0 [ssb] [<c1269f4e>] gpiochip_add+0xee/0x300 [<fd1f78bd>] ? ssb_pcicore_serdes_workaround+0xfd/0x140 [ssb] [<fd1f7e39>] ssb_gpio_init+0x89/0xa0 [ssb] [<fd1f0bd8>] ssb_attach_queued_buses+0xc8/0x2d0 [ssb] [<fd1f0f65>] ssb_bus_register+0x185/0x1f0 [ssb] [<fd1f3120>] ? ssb_pci_xtal+0x220/0x220 [ssb] [<fd1f106c>] ssb_bus_pcibus_register+0x2c/0x80 [ssb] [<fd1f40dc>] ssb_pcihost_probe+0x9c/0x110 [ssb] [<c1276c8f>] pci_device_probe+0x6f/0xc0 [<c11bdb55>] ? sysfs_create_link+0x25/0x40 [<c131d8b9>] driver_probe_device+0x79/0x360 [<c1276512>] ? pci_match_device+0xb2/0xc0 [<c131dc51>] __driver_attach+0x71/0x80 [<c131dbe0>] ? __device_attach+0x40/0x40 [<c131bd87>] bus_for_each_dev+0x47/0x80 [<c131d3ae>] driver_attach+0x1e/0x20 [<c131dbe0>] ? __device_attach+0x40/0x40 [<c131d007>] bus_add_driver+0x157/0x230 [<c131e219>] driver_register+0x59/0xe0 ... Fix this by checking chip->dev pointer against NULL first. Also we can now remove redundant check in acpi_gpiochip_request/free_interrupts(). Reported-by: Sabrina Dubroca <sd@queasysnail.net> Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com> Tested-by: Sabrina Dubroca <sd@queasysnail.net> Acked-by: Alexandre Courbot <acourbot@nvidia.com> Tested-by: Josh Boyer <jwboyer@fedoraproject.org> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2014-04-14gpio: set data first, then chip and handlerLinus Walleij1-1/+1
During irq mapping, in irq_set_chip_and_handler() the process of setting this up may incur calls to lock the irqchip, which in turn may need to dereference and use the chip data. So set the data first, then set the chip and handler. Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2014-04-07Merge tag 'mfd-for-linus-3.15' of ↵Linus Torvalds1-1/+25
git://git.kernel.org/pub/scm/linux/kernel/git/lee/mfd Pull MFD updates from Lee Jones: "Changes to existing drivers: - Use of managed resources - omap, twl4030, ti_am335x_tscadc - Advanced error handling - omap - Rework clk management - omap - Device Tree (re-)work - tc3589x, pm8921, da9055, sec - IRC management overhaul and !BROKEN - pm8921 - Convert to regmap - ssbi, pm8921 - Use simple power-management ops - ucb1x00 - Include file clean-up - adp5520, cs5535, janz, lpc_ich, - lpc_sch, max14577, mcp-sa11x0, pcf50633-adc, rc5t583, rdc321x-southbridge, retu, smsc-ece1099, ti-ssp, ti_am335x_tscadc, tps65912, vexpress-config, wm8350, ywm8350 - Various bug fixes across the subsystem - NULL/invalid pointer dereference prevention - Resource leak mitigation, - Variable used initialised - Staticise various containers - Enforce return value checks New drivers/supported devices: - Add support for s2mps14 and s2mpa01 to sec - Add support for da9063 (v5) to da9063 - Add support for atom-c2000 to gpio-ich - Add support for come-{mbt10,cbt6,chl6} to kempld - Add support for da9053 to da9052 - Add support for itco-wdt (v3) and baytrail to lpc_ich - Add new drivers for tps65218, rtsx_usb, bcm590xx (Re-)moved drivers: - twl4030 ==> drivers/iio - ti-ssp ==> /dev/null" * tag 'mfd-for-linus-3.15' of git://git.kernel.org/pub/scm/linux/kernel/git/lee/mfd: (103 commits) mfd: wm5110: Correct default for HEADPHONE_DETECT_1 mfd: arizona: Correct small errors in the DT binding documentation mfd: arizona: Mark DSP clocking register as volatile mfd: devicetree: bindings: Add pm8xxx RTC description mfd: kempld-core: Fix potential hang-up during boot mfd: sec-core: Fix uninitialized 'regmap_rtc' on S2MPA01 mfd: tps65910: Fix regmap_irq_chip_data leak on mfd_add_devices fail mfd: tps65910: Fix possible invalid pointer dereference on regmap_add_irq_chip fail mfd: sec-core: Fix I2C dummy device resource leak on probe failure mfd: sec-core: Add of_compatible strings for clock MFD cells mfd: Remove obsolete ti-ssp driver Documentation: mfd: s2mps11: Describe S5M8767 and S2MPS14 clocks mfd: bcm590xx: Fix type argument for module device table mfd: lpc_ich: Add support for Intel Bay Trail SoC mfd: lpc_ich: Add support for NM10 GPIO mfd: lpc_ich: Change Avoton to iTCO v3 watchdog: iTCO_wdt: Add support for v3 silicon mfd: lpc_ich: Add support for iTCO v3 mfd: lpc_ich: Remove lpc_ich_cfg struct use mfd: lpc_ich: Only configure watchdog or GPIO when present ...
2014-04-06Merge tag 'drivers-3.15' of ↵Linus Torvalds1-1/+1
git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc Pull ARM SoC driver changes from Arnd Bergmann: "These changes are mostly for ARM specific device drivers that either don't have an upstream maintainer, or that had the maintainer ask us to pick up the changes to avoid conflicts. A large chunk of this are clock drivers (bcm281xx, exynos, versatile, shmobile), aside from that, reset controllers for STi as well as a large rework of the Marvell Orion/EBU watchdog driver are notable" * tag 'drivers-3.15' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (99 commits) Revert "dts: socfpga: Add DTS entry for adding the stmmac glue layer for stmmac." Revert "net: stmmac: Add SOCFPGA glue driver" ARM: shmobile: r8a7791: Fix SCIFA3-5 clocks ARM: STi: Add reset controller support to mach-sti Kconfig drivers: reset: stih416: add softreset controller drivers: reset: stih415: add softreset controller drivers: reset: Reset controller driver for STiH416 drivers: reset: Reset controller driver for STiH415 drivers: reset: STi SoC system configuration reset controller support dts: socfpga: Add sysmgr node so the gmac can use to reference dts: socfpga: Add support for SD/MMC on the SOCFPGA platform reset: Add optional resets and stubs ARM: shmobile: r7s72100: fix bus clock calculation Power: Reset: Generalize qnap-poweroff to work on Synology devices. dts: socfpga: Update clock entry to support multiple parents ARM: socfpga: Update socfpga_defconfig dts: socfpga: Add DTS entry for adding the stmmac glue layer for stmmac. net: stmmac: Add SOCFPGA glue driver watchdog: orion_wdt: Use %pa to print 'phys_addr_t' drivers: cci: Export CCI PMU revision ...
2014-04-04Merge tag 'gpio-v3.15-1' of ↵Linus Torvalds35-672/+1994
git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio Pull bulk of gpio updates from Linus Walleij: "A pretty big chunk of changes this time, but it has all been on rotation in linux-next and had some testing. Of course there will be some amount of fixes on top... - Merged in a branch of irqchip changes from Thomas Gleixner: we need to have new callbacks from the irqchip to determine if the GPIO line will be eligible for IRQs, and this callback must be able to say "no". After some thinking I got the branch from tglx and have switched all current users over to use this. - Based on tglx patches, we have added some generic irqchip helpers in the gpiolib core. These will help centralize code when GPIO drivers have simple chained/cascaded IRQs. Drivers will still define their irqchip vtables, but the gpiolib core will take care of irqdomain set-up, mapping from local offsets to Linux irqs, and reserve resources by marking the GPIO lines for IRQs. - Initially the PL061 and Nomadik GPIO/pin control drivers have been switched over to use the new gpiochip-to-irqchip infrastructure with more drivers expected for the next kernel cycle. The factoring of just two drivers still makes it worth it so it is already a win. - A new driver for the Synopsys DesignWare APB GPIO block. - Modify the DaVinci GPIO driver to be reusable also for the new TI Keystone architecture. - A new driver for the LSI ZEVIO SoCs. - Delete the obsolte tnetv107x driver. - Some incremental work on GPIO descriptors: have gpiod_direction_output() use a logical level, respecting assertion polarity through ACTIVE_LOW flags, adding gpiod_direction_output_raw() for the case where you want to set that very value. Add gpiochip_get_desc() to fetch a GPIO descriptor from a specific offset on a certain chip inside driver code. - Switch ACPI GPIO code over to using gpiochip_get_desc() and get rid of gpio_to_desc(). - The ACPI GPIO event handling code has been reworked after encountering an actual real life implementation. - Support for ACPI GPIO operation regions. - Generic GPIO chips can now be assigned labels/names from platform data. - We now clamp values returned from GPIO drivers to the boolean [0,1] range. - Some improved documentation on how to use the polarity flag was added. - a large slew of incremental driver updates and non-critical fixes. Some targeted for stable" * tag 'gpio-v3.15-1' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio: (80 commits) gpio: rcar: Add helper variable dev = &pdev->dev gpio-lynxpoint: force gpio_get() to return "1" and "0" only gpio: unmap gpio irqs properly pch_gpio: set value before enabling output direction gpio: moxart: Actually set output state in moxart_gpio_direction_output() gpio: moxart: Avoid forward declaration gpio: mxs: Allow for recursive enable_irq_wake() call gpio: samsung: Add missing "break" statement gpio: twl4030: Remove redundant assignment gpio: dwapb: correct gpio-cells in binding document gpio: iop: fix devm_ioremap_resource() return value checking pinctrl: coh901: convert driver to use gpiolib irqchip pinctrl: nomadik: convert driver to use gpiolib irqchip gpio: pl061: convert driver to use gpiolib irqchip gpio: add IRQ chip helpers in gpiolib pinctrl: nomadik: factor in platform data container pinctrl: nomadik: rename secondary to latent gpio: Driver for SYSCON-based GPIOs gpio: generic: Use platform_device_id->driver_data field for driver flags pinctrl: coh901: move irq line locking to resource callbacks ...
2014-03-31MIPS: VR41xx: Mark GPIO lines used for IRQLinus Walleij1-0/+20
When an IRQ is started on a GPIO line, mark this GPIO as IRQ in the gpiolib so we can keep track of the usage centrally. Signed-off-by: Linus Walleij <linus.walleij@linaro.org> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: linux-mips@linux-mips.org Cc: linux-gpio@vger.kernel.org Cc: Alexandre Courbot <acourbot@nvidia.com> Patchwork: https://patchwork.linux-mips.org/patch/6417/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2014-03-29gpio: rcar: Add helper variable dev = &pdev->devGeert Uytterhoeven1-16/+16
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> Cc: linux-gpio@vger.kernel.org Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2014-03-29gpio-lynxpoint: force gpio_get() to return "1" and "0" onlyMathias Nyman1-1/+1
Don't return the IN_LVL_BIT directly, a high gpio line returned value "1073741824" intestead of "1" because IN_LVL_BIT is BIT(30) Tested-by: Jerome Blin <jerome.blin@intel.com> Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2014-03-28gpio: unmap gpio irqs properlyLinus Walleij1-4/+29
When using the irqchip helper inside the gpiolib, make sure the IRQs are unmapped/disposed before the irqdomain is removed as part of removing the gpiochip. Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2014-03-27pch_gpio: set value before enabling output directionDaniel Krueger1-3/+5
This ensures that the output signal does not toggle if set to high. Signed-off-by: Daniel Krueger <daniel.krueger@systec-electronic.com> Signed-off-by: Alexander Stein <alexander.stein@systec-electronic.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2014-03-27gpio: moxart: Actually set output state in moxart_gpio_direction_output()Axel Lin1-0/+1
moxart_gpio_direction_output() ignored the state passed into it. Fix it. Signed-off-by: Axel Lin <axel.lin@ingics.com> Reviewed-by: Alexandre Courbot <acourbot@nvidia.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2014-03-27gpio: moxart: Avoid forward declarationAxel Lin1-20/+19
Slightly adjust the code to avoid forward declaration as we need to call moxart_gpio_set() in moxart_gpio_direction_output() to properly set the output state. Signed-off-by: Axel Lin <axel.lin@ingics.com> Reviewed-by: Alexandre Courbot <acourbot@nvidia.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2014-03-27gpio: mxs: Allow for recursive enable_irq_wake() callMarek Vasut1-1/+2
The scenario here is that someone calls enable_irq_wake() from somewhere in the code. This will result in the lockdep producing a backtrace as can be seen below. In my case, this problem is triggered when using the wl1271 (TI WlCore) driver found in drivers/net/wireless/ti/ . The problem cause is rather obvious from the backtrace, but let's outline the dependency. enable_irq_wake() grabs the IRQ buslock in irq_set_irq_wake(), which in turns calls mxs_gpio_set_wake_irq() . But mxs_gpio_set_wake_irq() calls enable_irq_wake() again on the one-level-higher IRQ , thus it tries to grab the IRQ buslock again in irq_set_irq_wake() . Because the spinlock in irq_set_irq_wake()->irq_get_desc_buslock()->__irq_get_desc_lock() is not marked as recursive, lockdep will spew the stuff below. We know we can safely re-enter the lock, so use IRQ_GC_INIT_NESTED_LOCK to fix the spew. ============================================= [ INFO: possible recursive locking detected ] 3.10.33-00012-gf06b763-dirty #61 Not tainted --------------------------------------------- kworker/0:1/18 is trying to acquire lock: (&irq_desc_lock_class){-.-...}, at: [<c00685f0>] __irq_get_desc_lock+0x48/0x88 but task is already holding lock: (&irq_desc_lock_class){-.-...}, at: [<c00685f0>] __irq_get_desc_lock+0x48/0x88 other info that might help us debug this: Possible unsafe locking scenario: CPU0 ---- lock(&irq_desc_lock_class); lock(&irq_desc_lock_class); *** DEADLOCK *** May be due to missing lock nesting notation 3 locks held by kworker/0:1/18: #0: (events){.+.+.+}, at: [<c0036308>] process_one_work+0x134/0x4a4 #1: ((&fw_work->work)){+.+.+.}, at: [<c0036308>] process_one_work+0x134/0x4a4 #2: (&irq_desc_lock_class){-.-...}, at: [<c00685f0>] __irq_get_desc_lock+0x48/0x88 stack backtrace: CPU: 0 PID: 18 Comm: kworker/0:1 Not tainted 3.10.33-00012-gf06b763-dirty #61 Workqueue: events request_firmware_work_func [<c0013eb4>] (unwind_backtrace+0x0/0xf0) from [<c0011c74>] (show_stack+0x10/0x14) [<c0011c74>] (show_stack+0x10/0x14) from [<c005bb08>] (__lock_acquire+0x140c/0x1a64) [<c005bb08>] (__lock_acquire+0x140c/0x1a64) from [<c005c6a8>] (lock_acquire+0x9c/0x104) [<c005c6a8>] (lock_acquire+0x9c/0x104) from [<c051d5a4>] (_raw_spin_lock_irqsave+0x44/0x58) [<c051d5a4>] (_raw_spin_lock_irqsave+0x44/0x58) from [<c00685f0>] (__irq_get_desc_lock+0x48/0x88) [<c00685f0>] (__irq_get_desc_lock+0x48/0x88) from [<c0068e78>] (irq_set_irq_wake+0x20/0xf4) [<c0068e78>] (irq_set_irq_wake+0x20/0xf4) from [<c027260c>] (mxs_gpio_set_wake_irq+0x1c/0x24) [<c027260c>] (mxs_gpio_set_wake_irq+0x1c/0x24) from [<c0068cf4>] (set_irq_wake_real+0x30/0x44) [<c0068cf4>] (set_irq_wake_real+0x30/0x44) from [<c0068ee4>] (irq_set_irq_wake+0x8c/0xf4) [<c0068ee4>] (irq_set_irq_wake+0x8c/0xf4) from [<c0310748>] (wlcore_nvs_cb+0x10c/0x97c) [<c0310748>] (wlcore_nvs_cb+0x10c/0x97c) from [<c02be5e8>] (request_firmware_work_func+0x38/0x58) [<c02be5e8>] (request_firmware_work_func+0x38/0x58) from [<c0036394>] (process_one_work+0x1c0/0x4a4) [<c0036394>] (process_one_work+0x1c0/0x4a4) from [<c0036a4c>] (worker_thread+0x138/0x394) [<c0036a4c>] (worker_thread+0x138/0x394) from [<c003cb74>] (kthread+0xa4/0xb0) [<c003cb74>] (kthread+0xa4/0xb0) from [<c000ee00>] (ret_from_fork+0x14/0x34) wlcore: loaded Cc: stable@vger.kernel.org Signed-off-by: Marek Vasut <marex@denx.de> Acked-by: Shawn Guo <shawn.guo@linaro.org> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2014-03-27gpio: samsung: Add missing "break" statementAlexander Shiyan1-0/+1
Signed-off-by: Alexander Shiyan <shc_work@mail.ru> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2014-03-27gpio: twl4030: Remove redundant assignmentAlexander Shiyan1-3/+3
Variable "status" is never used, so remove it and add warning if any error happen. Signed-off-by: Alexander Shiyan <shc_work@mail.ru> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2014-03-26gpio: iop: fix devm_ioremap_resource() return value checkingBartlomiej Zolnierkiewicz1-0/+2
devm_ioremap_resource() returns a pointer to the remapped memory or an ERR_PTR() encoded error code on failure. Fix the check inside iop3xx_gpio_probe() accordingly. Cc: Lennert Buytenhek <kernel@wantstofly.org> Cc: Mikael Pettersson <mikpe@it.uu.se> Cc: Aaro Koskinen <aaro.koskinen@iki.fi> Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com> Acked-by: Alexandre Courbot <acourbot@nvidia.com> Acked-by: Dan Williams <dan.j.williams@intel.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2014-03-26gpio: pl061: convert driver to use gpiolib irqchipLinus Walleij2-62/+19
This converts the PL061 driver to register its chained irq handler and irqchip using the helpers in the gpiolib core. Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2014-03-26gpio: add IRQ chip helpers in gpiolibLinus Walleij2-0/+191
This provides a function gpiochip_irqchip_add() to set up an irqchip for a GPIO controller, and a function gpiochip_set_chained_irqchip() to chain it to a parent irqchip. Most GPIOs are of the type where a number of lines form a cascaded interrupt controller chained onto the primary system interrupt controller (or further down the chain) so let's add this helper and factor the code to request the lines to be used as IRQs, the .to_irq() function and the irqdomain into the core as well. Acked-by: Thomas Gleixner <tglx@linutronix.de> Acked-by: Alexandre Courbot <acourbot@nvidia.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2014-03-19gpio: ich: Add support for Intel AvotonVincent Donnefort1-1/+25
This patch adds support for Atom C2000 series (Avoton and Rangeley). And has the following options: - New addresses register. - Caching output levels (see Intel external design spec, table 48-29) - No hardware blink. Acked-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Vincent Donnefort <vdonnefort@gmail.com> Signed-off-by: Lee Jones <lee.jones@linaro.org>
2014-03-19gpio: ich: Add output levels cache supportVincent Donnefort1-2/+19
This patch allows GPIO driver to cache GPIO_LVL output registers. The aim is to support chipsets on which GPIO_LVL value can't be read for output pins. Caching output levels implies the first output values reading as 0. The driver so can't be aware of set values GPIOs by bootloader or BIOS. Acked-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Vincent Donnefort <vdonnefort@gmail.com> Signed-off-by: Lee Jones <lee.jones@linaro.org>
2014-03-19gpio: ich: Add support for multiple register addressesVincent Donnefort1-12/+31
This patch introduces regs and reglen pointers which allow a chipset to have register addresses differing from ICH ones. Acked-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Vincent Donnefort <vdonnefort@gmail.com> Signed-off-by: Lee Jones <lee.jones@linaro.org>
2014-03-19gpio: ich: Add blink capability optionVincent Donnefort1-1/+9
This patch allows gpio_ich driver to be aware of non blink capable chipsets. Acked-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Vincent Donnefort <vdonnefort@gmail.com> Signed-off-by: Lee Jones <lee.jones@linaro.org>
2014-03-18gpio: Driver for SYSCON-based GPIOsAlexander Shiyan3-0/+198
SYSCON driver was designed for using memory areas (registers) that are used in several subsystems. There are systems (CPUs) which use bits in one register for various purposes and thus should be handled by various kernel subsystems. This driver allows you to use the individual SYSCON bits as GPIOs. ARM CLPS711X SYSFLG1 input lines has been added as first user of this driver. Signed-off-by: Alexander Shiyan <shc_work@mail.ru> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2014-03-18gpio: generic: Use platform_device_id->driver_data field for driver flagsAlexander Shiyan1-7/+9
Signed-off-by: Alexander Shiyan <shc_work@mail.ru> Reviewed-by: Alexandre Courbot <acourbot@nvidia.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2014-03-18gpio: switch drivers to use new callbackLinus Walleij8-57/+56
This switches all GPIO and pin control drivers with irqchips that were using .startup() and .shutdown() callbacks to lock GPIO lines for IRQ usage over to using the .request_resources() and .release_resources() callbacks just introduced into the irqchip vtable. Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Jean-Jacques Hiblot <jjhiblot@traphandler.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2014-03-14gpio / ACPI: Add support for ACPI GPIO operation regionsMika Westerberg1-0/+163
GPIO operation regions is a new feature introduced in ACPI 5.0 specification. This feature adds a way for platform ASL code to call back to OS GPIO driver and toggle GPIO pins. An example ASL code from Lenovo Miix 2 tablet with only relevant part listed: Device (\_SB.GPO0) { Name (AVBL, Zero) Method (_REG, 2, NotSerialized) { If (LEqual (Arg0, 0x08)) { // Marks the region available Store (Arg1, AVBL) } } OperationRegion (GPOP, GeneralPurposeIo, Zero, 0x0C) Field (GPOP, ByteAcc, NoLock, Preserve) { Connection ( GpioIo (Exclusive, PullDefault, 0, 0, IoRestrictionOutputOnly, "\\_SB.GPO0", 0x00, ResourceConsumer,,) { 0x003B } ), SHD3, 1, } } Device (SHUB) { Method (_PS0, 0, Serialized) { If (LEqual (\_SB.GPO0.AVBL, One)) { Store (One, \_SB.GPO0.SHD3) Sleep (0x32) } } Method (_PS3, 0, Serialized) { If (LEqual (\_SB.GPO0.AVBL, One)) { Store (Zero, \_SB.GPO0.SHD3) } } } How this works is that whenever _PS0 or _PS3 method is run (typically when SHUB device is transitioned to D0 or D3 respectively), ASL code checks if the GPIO operation region is available (\_SB.GPO0.AVBL). If it is we go and store either 0 or 1 to \_SB.GPO0.SHD3. Now, when ACPICA notices ACPI GPIO operation region access (the store above) it will call acpi_gpio_adr_space_handler() that then toggles the GPIO accordingly using standard gpiolib interfaces. Implement the support by registering GPIO operation region handlers for all GPIO devices that have an ACPI handle. First time the GPIO is used by the ASL code we make sure that the GPIO stays requested until the GPIO chip driver itself is unloaded. If we find out that the GPIO is already requested we just toggle it according to the value got from ASL code. Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2014-03-14Merge tag 'v3.14-rc6' into develLinus Walleij5-4/+22
Linux 3.14-rc6
2014-03-14gpio: clamp returned values to the boolean rangeAlexandre Courbot1-6/+6
Nothing prevents GPIO drivers from returning values outside the boolean range, and as it turns out a few drivers are actually doing so. These values were passed as-is to unsuspecting consumers and created confusion. This patch makes the internal _gpiod_get_raw_value() function return a bool, effectively clamping the GPIO value to the boolean range no matter what the driver does. While we are at it, we also change the value parameter of _gpiod_set_raw_value() to bool type before drivers start doing funny things with it as well. Another way to fix this would be to change the prototypes of the driver interface to use bool directly, but this would require a huge cross-systems patch so this simpler solution is preferred. Changes since v1: - Change local variable type to bool as well, use boolean values in code - Also change prototype of open drain/open source setting functions since they are only called from _gpiod_set_raw_value() This probably calls for a larger booleanization of gpiolib, but let's keep that for a latter change - right now we need to address the issue of non-boolean values returned by drivers. Signed-off-by: Alexandre Courbot <acourbot@nvidia.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2014-03-13gpio / ACPI: Rework ACPI GPIO event handlingMika Westerberg2-86/+131
The current ACPI GPIO event handling code was never tested against real hardware with functioning GPIO triggered events (at the time such hardware wasn't available). Thus it misses certain things like requesting the GPIOs properly, passing correct flags to the interrupt handler and so on. This patch reworks ACPI GPIO event handling so that we: 1) Use struct acpi_gpio_event for all GPIO signaled events. 2) Switch to use GPIO descriptor API and request GPIOs by calling gpiochip_request_own_desc() that we added in a previous patch. 3) Pass proper flags from ACPI GPIO resource to request_threaded_irq(). Also instead of open-coding the _AEI iteration loop we can use acpi_walk_resources(). This simplifies the code a bit and fixes memory leak that was caused by missing kfree() for buffer returned by acpi_get_event_resources(). Since the remove path now calls gpiochip_free_own_desc() which takes GPIO spinlock we need to call acpi_gpiochip_remove() outside of that lock (analogous to acpi_gpiochip_add() path where the lock is released before those funtions are called). Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com> Reviewed-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2014-03-13gpio / ACPI: Rename acpi_gpio_evt_pin to acpi_gpio_eventMika Westerberg1-20/+19
In order to consolidate _Exx, _Lxx and _EVT to use the same structure make the structure name to reflect that we are dealing with any event, not just _EVT. This is just rename, no functional changes. Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2014-03-13gpio / ACPI: Allocate ACPI specific data directly in acpi_gpiochip_add()Mika Westerberg1-42/+64
We are going to add more ACPI specific data to accompany GPIO chip so instead of allocating it per each use-case we allocate it once when acpi_gpiochip_add() is called and release it when acpi_gpiochip_remove() is called. Doing this allows us to add more ACPI specific data by merely adding new fields to struct acpi_gpio_chip. In addition we embed evt_pins member directly to the structure instead of having it as a pointer. This simplifies the code a bit since we don't need to check against NULL. Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2014-03-13gpiolib: Allow GPIO chips to request their own GPIOsMika Westerberg2-27/+76
Sometimes it is useful to allow GPIO chips themselves to request GPIOs they own through gpiolib API. One use case is ACPI ASL code that should be able to toggle GPIOs through GPIO operation regions. We can't use gpio_request() because it will pin the module to the kernel forever (it calls try_module_get()). To solve this we move module refcount manipulation to gpiod_request() and let __gpiod_request() handle the actual request. This changes the sequence a bit as now try_module_get() is called outside of gpio_lock (I think this is safe, try_module_get() handles serialization it needs already). Then we provide gpiolib internal functions gpiochip_request/free_own_desc() that do the same as gpio_request() but don't manipulate module refrence count. This allows the GPIO chip driver to request and free descriptors it owns without being pinned to the kernel forever. Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com> Reviewed-by: Alexandre Courbot <acourbot@nvidia.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2014-03-12gpio: Spelling s/than/that/Geert Uytterhoeven1-1/+1
Signed-off-by: Geert Uytterhoeven <geert+renesas@linux-m68k.org> Cc: Linus Walleij <linus.walleij@linaro.org> Cc: linux-gpio@vger.kernel.org Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2014-03-12gpio: cs5535: Simplify dependenciesJean Delvare1-1/+1
The bus and architecture dependencies are already on MFD_CS5535, so there is no need to repeat them here. Signed-off-by: Jean Delvare <jdelvare@suse.de> Cc: Linus Walleij <linus.walleij@linaro.org> Cc: Alexandre Courbot <gnurou@gmail.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2014-03-12gpio: mcp23s08: trivial: fixed coding style issuesGary Servin1-11/+11
This coding style issue was detected using the checkpatch.pl script Signed-off-by: Gary Servin <garyservin@gmail.com> Reviewed-by: Alexandre Courbot <acourbot@nvidia.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2014-03-12gpio: max732x: Fix possible NULL pointer dereference on i2c_new_dummy errorKrzysztof Kozlowski1-0/+7
In max732x_probe() driver allocates dummy I2C device (if number of ports is greater than 8) with i2c_new_dummy() but it does not check the return value of this call. In case of error (i2c_new_device(): memory allocation failure or I2C address cannot be used) this function returns NULL which is later dereferenced by i2c_smbus_read_byte() (called from max732x_readb()). Signed-off-by: Krzysztof Kozlowski <k.kozlowski@samsung.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2014-03-12gpio: max732x: Fix I2C dummy device resource leak on probe failureKrzysztof Kozlowski1-0/+2
In max732x_probe() driver allocates dummy I2C device (if number of ports is greater than 8) however it is not unregistered if probe fails later. Fix the leak by unregistering dummy I2C device if it was allocated. Signed-off-by: Krzysztof Kozlowski <k.kozlowski@samsung.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2014-03-11gpio: davinci: fix gpio selection for OFAlexander Holler1-0/+24
The driver missed an of_xlate function to translate gpio numbers as found in the DT to the correct chip and number. While there I've set #gpio_cells to a fixed value of 2. I've used gpio-pxa.c as template for those changes and tested my changes successfully on a da850 board using entries for gpio-leds in a DT. So I didn't reinvent the wheel but just copied and tested stuff. Thanks to Grygorii Strashko for the hint to the existing code in gpio-pxa. Signed-off-by: Alexander Holler <holler@ahsoftware.de> Signed-off-by: Grygorii Strashko <grygorii.strashko@ti.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2014-03-07gpio-tz1090: Replace commas with semi-colonsJames Hogan1-14/+14
Replace commas with semicolons between irqchip callback initialisation statements in tz1090_gpio_bank_probe. The commas appear to be a subtle remnant of when the irqchips were statically initialised. Thanks to Thomas Gleixner for spotting it while whipping up a coccinelle script. Reported-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: James Hogan <james.hogan@imgtec.com> Cc: Alexandre Courbot <gnurou@gmail.com> Cc: linux-gpio@vger.kernel.org Cc: linux-metag@vger.kernel.org Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2014-03-07gpio: remove misleading documentationLinus Walleij1-4/+1
It is currently debated where the functions to lock a certain GPIO line as used for IRQs should be called. Delete all misleading documentation. Reported-by: Thomas Gleixner <tglx@linutronix.de> Cc: Jean-Jacques Hiblot <jjhiblot@traphandler.com> Acked-by: Alexandre Courbot <acourbot@nvidia.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2014-03-07gpio: gpio-pl061: Use %pa to print 'resource_size_t'Fabio Estevam1-2/+2
The following build warning is generated when building multi_v7_defconfig with LPAE option selected: drivers/gpio/gpio-pl061.c:358:2: warning: format '%x' expects argument of type 'unsigned int', but argument 3 has type 'resource_size_t' [-Wformat=] Fix it by using %pa to print 'resource_size_t'. Reported-by: Olof's autobuilder <build@lixom.net> Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2014-03-07fix build error in gpio-dwapb patchAlan Tull1-1/+1
fix build error with this message: kernel/irq/Kconfig:41:error: recursive dependency detected! kernel/irq/Kconfig:41: symbol GENERIC_IRQ_CHIP is selected by GPIO_DWAPB drivers/gpio/Kconfig:131: symbol GPIO_DWAPB depends on IRQ_DOMAIN kernel/irq/Kconfig:46: symbol IRQ_DOMAIN is selected by GENERIC_IRQ_CHIP Signed-off-by: Alan Tull <atull@altera.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2014-03-06gpio: zevio: depend on ARM and OF_GPIOLinus Walleij1-1/+1
Instead of just depending on OF and getting build failures, depend on ARM && OF_GPIO. Cc: Fabian Vogt <fabian@ritter-vogt.de> Cc: Stephen Rothwell <sfr@canb.auug.org.au> Cc: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2014-03-05gpio: remove obsolete tnetv107x driverArnd Bergmann2-207/+0
The tnetv107x platform is getting removed, so this driver won't be needed any more. Signed-off-by: Arnd Bergmann <arnd@arndb.de> Cc: Linus Walleij <linus.walleij@linaro.org> Cc: Alexandre Courbot <gnurou@gmail.com> Cc: linux-gpio@vger.kernel.org Acked-by: Sekhar Nori <nsekhar@ti.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2014-03-05gpio: add a driver for the Synopsys DesignWare APB GPIO blockJamie Iles3-0/+448
The Synopsys DesignWare block is used in some ARM devices (picoxcell) and can be configured to provide multiple banks of GPIO pins. v12: - Add irq_startup/shutdown - do irq_create_mapping() in probe, irq_find_mapping() in to_irq() - Adjust mappings to show support for 1 gpio per port. - gpio-cells = <1> v11: - Use NULL when checking existence of 'interrupts' property - Bindings descriptions cleanup v10: - in documentation nr-gpio -> nr-gpios v9: - cleanup in dt bindings doc - use of_get_child_count() v8: - remove socfpga.dtsi changes - minor cleanup in devicetree documentation v7: - use irq_generic_chip - support one irq per gpio line or one irq for many - s/bank/port/ and other cleanup v6: - (atull) squash the set of patches - use linear irq domain - build fixes. Original driver was reviewed on v3.2. - Fix setting irq edge type for 'rising' and 'both'. - Support as a loadable module. - Use bgpio_chip's spinlock during register access. - Clean up register names to match spec - s/bank/port/ because register names use the word 'port' - s/nr-gpio/nr-gpios/ - don't get/put the of_node - remove signoffs/acked-by's because of changes - other cleanup v5: - handle sparse bank population correctly v3: - depend on rather than select IRQ_DOMAIN - split IRQ support into a separate patch v2: - use Rob Herring's irqdomain in generic irq chip patches - use reg property to indicate bank index - support irqs on both edges based on LinusW's u300 driver Signed-off-by: Jamie Iles <jamie@jamieiles.com> Signed-off-by: Alan Tull <atull@altera.com> Reviewed-by: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2014-03-04gpio: davinci: reuse for keystone socGrygorii Strashko1-8/+40
The similar GPIO HW block is used by keystone SoCs as in Davinci SoCs. Hence, reuse Davinci GPIO driver for Keystone taking into account that Keystone contains ARM GIC IRQ controller which is implemented using IRQ Chip. Documentation: http://www.ti.com/lit/ug/sprugv1/sprugv1.pdf Acked-by: Santosh Shilimkar <santosh.shilimkar@ti.com> Acked-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Grygorii Strashko <grygorii.strashko@ti.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2014-02-27gpio: New driver for LSI ZEVIO SoCsFabian Vogt3-0/+227
This driver supports the GPIO controller found in LSI ZEVIO SoCs. It has been successfully tested on a TI nspire CX calculator. Signed-off-by: Fabian Vogt <fabian@ritter-vogt.de> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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